• Country
• United States of America (USA)

• Manufacturer / Brand
• Columbia Phonograph, American / Volta Graphophone Company; USA

• Year
• 1931 ?

• Category
• Broadcast Receiver - or past WW2 Tuner

• Radiomuseum.org ID
• 35639

• • alternative name: American Graphophone || Columbia Recording

Click on the schematic thumbnail to request the schematic as a free document.

• Main principle
• Superheterodyne (common)

• from Radiomuseum.org
• Model: 34 - Columbia Phonograph, American

• Notes
• Rider´s shows only the chassis drawing.

• External source of data
• Ernst Erb

• Circuit diagram reference
• Rider's Perpetual, Volume 2 = 1932 (Models 1931/1932)

• Other Models

• Here you find 103 models, 69 with images and 34 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Columbia Phonograph, American / Volta Graphophone Company; USA